Process of electric welding



(No Model.)

0. L. OOPPIN.

PROCESS OF ELECTRIC WELDING.

No. 396,270. Patented Jan. 15, 1889.

UNITED STATES PATENT EEic CHARLES Ii. CIOFFIN, OF DETROIT, IlIICIIIGAN.

PROCESS OF ELECTRIC WELDING.

SPECIFICATION forming part of Letters Patent No. 396,270, dated January15, 1889. Application fi ed June 19, 1888. Serial No. 277,513. (Nomodel.)

To aZZ whom it may concern.-

Be it known that 1, CHARLES l CoEIn-N, of Detroit, in the county of\Vayne and State of Michigan, have invented a new and useful Improvementin Electric \Yelding, of which the following is a specification.

My invention consists in an improved process of electric welding,hereinafter fully described and claimed.

The process consists in forming the voltaie arc in such manner that itshall extend outside of a straight line joining the ends of a positiveand negative conductor, and then drawing the conductors while thecurrent is passing along the joints to be weldednvhereby the joint issubmitted to the action of the voltaie are; and, as an addition to thisprocess, my invention further consists in feeding to the joints to bewelded and within the in fluence of the voltaic are a strip of metal,which is fused by the arc and deposited on or in the joint, whereby thewelded joint is re-enforced.

The apparatusby which my processmay be carried out may be varied in formor construction, it only being necessary that the are when formed shallspring beyond the ends of the carbons, which may be done eitherby theposition of the carbons or by deflecting the arc magnetically in awell-known manner.

A mechanism which may be used to practice my process is illustrated inthe accompanying drawings, in which Figures and 2 are front elevations,being exactly alike except that Fig. 2 has added a guide for feeding thereenforcing piece of metal.

B represents a carbon-holder, and A represents a box on said holder,containing mechanism for feeding the carbons as they are worn away,which is not shown, as it forms no part of the invention designed to behereby secured.

U C represent two carbon pencils secured in holder B at an angle witheach other, whereby the voltaic are L is sprung outward from thestraight line joining the point of the carbons, as shown in the figures,so that this are may be brought into contact with the joint to be weldedwithout touching thejoint with the carbon. I

F represents an insulated handle for the carbon-holder B,by which itmaybe operated by an attendant.

G II representbimjling-posts through which the poles of the generatormay be connected with carbons C C.

E E represent insulated rollers, which may be used to support the holderl3 and permit. it to be drawn along the joints, the rollers S restingeither on the sheets of metal to be welded or on table carrying thework. These may be used or not, as willed.

In Fig. 2, I represents a guide, consisting of a hollow pipe secured tothe carbon-holderB, and D represents a wire or strip of metal, whichpasses through the carboii-holder and through said guide I, so that itsend passes between the points of the carbons C (l without touchingeither of them. The wire D should preferably be insulated from thecarbon-holder I so that it cannot possibly shortcircuit the carbons. Itis evident that when the points of the carbon are placed over the jointsto be welded the end of the wire I) will lie upon the joint, and that itwill be fused by the voltaic are at the same time the joint is fused,whereby the fused portion of the wire D will be laid along the .joint,thereby re-enforcing the welding.

I am aware that prior patents have described the proccss of electricwohling in which the voltaic are has been sprung between the metal to bewelded as one poleand a movable conductor as the other pole. and do notclaim any such process herein.

\Vhatl claim as my invmition, and desire to secure by Letters Patent, is

1. The hereindescribed process of elect ric welding, consisting informing a voltaic are between two conductors extending outward from saidconductors and submitting the joint to be welded to the action of saidarc.

2. The herein-described process of electric welding, consisting informing a voltaic arc between two conductors extending beyond the pointsthereof, feeding a strip of metal into the are between the conductors,and submitting the joints to be welded and said strip of metalsimultaneously to the action of said arc.

CHARLES L. (OFFIN Witnesses:

ADELAIDE A. AxDEEsox, GEo. H. LOTHROP.

